Terex Tower Cranes
Early Crane Evolution
The very first recorded idea or type of a crane was utilized by the early Egyptians more than 4000 years ago. This apparatus was known as a shaduf and was used to transport water. The crane was made out of a long pivoting beam which balanced on a vertical support. On one end a bucket was connected and on the other end of the beam, a heavy weight was attached.
During the first century, cranes were built to be powered by animals or humans that were moving on a wheel or a treadmill. These cranes had a wooden long boom known as a beam. The boom was attached to a base that rotates. The wheel or the treadmill was a power-driven operation that had a drum with a rope which wrapped around it. This rope additionally had a hook that carried the weight and was connected to a pulley at the top of the boom.
Cranes were utilized extensively in the Middle Ages to make the enormous cathedrals in Europe. These devices were also utilized to load and unload ships within main ports. Over time, major crane design advancements evolved. For instance, a horizontal boom was added to and was referred to as the jib. This boom addition allowed cranes to have the ability to pivot, thus really increasing the machine's range of motion. Following the 16th century, cranes had incorporated two treadmills on each side of a rotating housing that held the boom.
Cranes utilized humans and animals for power until the mid-19th century. This all changes quickly once steam engines were developed. At the turn of the century, IC or internal combustion engines and electric motors emerged. Cranes also became designed out of cast iron and steel rather than wood. The new designs proved longer lasting and more efficient. They could obviously run longer too with their new power sources and hence carry out larger jobs in less time.
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